Combined wet and dry air pump.



No. 873,688. PATENTED DEC. 10, 1907.. R. D. TOMLINSON.

COMBINED WET AND DRY AIR PUMP.

APPLICATION FILED JULY 25, 1907.

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No. 873,688. I PATENTED DEC. 10, 1907.

R. D. TOMLINSON. COMBINED WET AND DRY AIR PUMP.

APPLICATION FILED JULYZE, 1907.

3 SHEETS-SHEET 2.

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R. D. TOMLINSON. COMBINED WET AND DRY AIR PUMP.

APPLIGATION FILED JULY 25, 1907.

PATENTED DEC. 10, 1907..

3 SHEETS-SHEET 3.

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ROYAL D. TOMLINSON, OF MILWAUKEE,

WISCONSIN, AssIcNoR TO ALLIS-CHALMERS COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION OF NEW JERSEY.

COMBINED WET AND DRY AIR PUMP.

Specification of Letters Patent.

Patented Dec. 10, 1907.

Application filed July 251 1907- Serial No. 385.425.

To all whom it may concern:

Be it known that a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a certain new and useful Combined Wet and Dry Air Pump, of which the following is a specification.

This invention relates to a combined wet and dry air pump for removing liquids and gases from a receptacle and is specially designed for use in removing water and air from steam condensers; however, it may be used with other liquids and other gases wherever it is desirable to remove fluid and gas from a receptacle or receptacles.

It has been customary prior to this invention to use a single pump for removing both water and air from a condenser, but such pumps have proved to be comparatively ineflicient and wasteful of power.

The pump which is disclosed by this specification and the drawings accompanying the same comprises a simple and efficient arrangement of apparatus by which both the water and air may be removed from a condenser, the parts of the pump being few and simple and the arrangement being such that the plunger of the pump is acting as a suction dry air pump during the greater part of its suction stroke, whereby the plunger of the pump is balanced with respect to the air pressure and a suitable period of time is employed for permitting the pump cylinder to l with air.

I which is supported the operating engine 2,

I, ROYAL D. ToMLrNsoN, I

Referring to the drawings which accompany this specification and form a part thereof and on which the same reference characters are used to designate the same elements wherever they may appear in each of the several figures, and which drawings illustrate a pump embodying this invention,- Figure 1 is an elevation, with a part in section, of a combined wet and dry air pump. Fig. 2 is an elevation taken at right angles to the view as shown by Fig. 1, the view being taken on the line aa of said figure. Fig. 3 is an elevation, with parts in section, taken at right angles to the view as shown by Fig. 1, the view being taken on the line 6-?) of said figure.

The numeral 1 designates the pump upon 13, and main crank' of the that shown by the drawings being an ordinary form of fluid or steam actuated engine provided with the rocking valve gear 3, steam pipe 4, governor 5, main shaft 6, fly wheels 7, 8, eccentric 9, and connecting rod 10, all of these parts being of any ordinary or preferred construction, the cylinder 2 being su ported for the sake of compactness and c eapness of construction upon the pump 1 by the support 11, which, in the present instance, consists of a casing adapted to inclose the cross head 12, connecting rod engine, this casing being provided with doors 14, through which access may be had to its interior.

The pump proper consists of the shell 15 provided with the depressed bottom portion 16, with the interior of which communicates the pipe 16 leading from the condenser, and through which the water in the condenser is adapted to flow, preferably by gravity, to the interior of the shell 15. The shell 15 is provided on the interior thereof with a ledge 17, from which is supported the depending pump barrel 18, said pump barrel being provided near its lower end with the ports 180, and its top being closed by the plate 19, provided with the outlet valves 20. A plate 21 closes the top of the pump and forms a chamber 22, with which the outlet pipe 23 communicates, access being had to this chamber by manholes provided with covers 24. The casing 15 is also provided with a valve seat 25 within which is located an ordinary type of cylindrical or rocking valve 26, a port 27 being provided in the barrel 18, which port is adapted to be placed in open communication with the dry air pipe 28, which communicates with the condenser, not shown, at a suitable point.

The valve 26 is connected by means of the connecting rod 29, with the engine eccentric 9, it being attached thereto at such a point that the valve 26 will open immediately after the plunger 30 has started to descend, and will close just before the plunger starts to ascend. The plunger 30 is connected with the cross head 12 by the plunger rods 31.

The ports 180 are provided in the barrel 18 so that the water may flow from casing 15 to the interior of the barrel 18 above the plunger 30, the specific construction shown and described being adopted as a matter of convenience, as any other equivalent arrangement of parts by which the plunger 30 is guided while permitting the water to enter the barrel 18 above the same would be equally as serviceable in the operation of the pump.

By the construction adopted and in which construction the port 27 is placed near the top of the barrel 18, air is free to pass into the barrel 18 during practically the whole of the downward stroke of the plunger, this action being of great importance as air at the low pressures existing and maintained in condensers moves very slowly and requires considerable time to expand into a pump barrel or cylinder.

The operation of the apparatus is as fol lows: The plunger 30 being at its upward limit of stroke, valve 26 is closed, valves 20 are open, and the air and water which have been lifted by the pump are in chamber 22 and escaping through pipe 23. The ports and pump space above the plunger 30 are filled with water so that all the air has been forced into chamber 22. The plunger now begins to descend. The valves 20 close and the plunger tends to create a vacuum between itself and the plate 19. When the plunger passes the port 27, the valve 26 opens and air flows into the pump barrel 18, the pump acting as a dry air pump solely until the plunger opens the ports 18, when water also passes into the pump barrel until the downward limit of the stroke is reached. The plunger 30 then starts u ward, at which time, or just before, the val ve 26 is closed, whereby the air which has entered the pump barrel is retained therein. As the plunger rises it carries a body of water above it and compresses the air between said water and the plate 19 until. sufiicient pressure is generated to open valves 20, when the air and water escape through said valves into chamber 22 and out through pipe 23.

l l l What I claim is,

1. The combination with a pump barrel of a plunger reciprocatable therein, said pump barrel being provided with a port for the entrance of water at one end, the other end of said barrel being closed but provided with a port and an outlet valve, said last mentioned end of the barrel being provided with an air entrance port, a valve to control said port, means to reciprocatesaid plunger in said barrel, and means to actuate said air inlet valve according to the movements of said plunger.

2. The combination with a pump barrel of a plunger reciprocatable therein, said pump barrel being provided with ports for the entrance of water at one end, the other end of said barrel being closed but provided with ports and outlet valves, said last mentioned end of the barrel being provided with an air entrance port, a valve to control said port, means to reciprocate said plunger in said. barrel, and means to mechanically actuate said air inlet valve according to the movements of said plunger.

3. The combination with a pump barrel of a plunger reciprocatable therein, said pump barrel being provided with a port for the entrance of water at one end, the other end of said barrel being closed but provided with a port and an outlet valve, said last mentioned end of the barrel being provided with an air entrance port, a valve to control said port, an engine for. reciprocating said plunger, said en ine being provided with an eccentric, and an eccentric rod connecting said eccentric and said air admission valve to mechanically actuate the same.

In testimony whereof, I affix my signature in the presence of two witnesses.

ROYAL D. TOMLINSON.

Witnesses:

G. F. DE WEIN, FRANK E. DENNETT. 

